3 * /proc support for DRM
5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
6 * \author Gareth Hughes <gareth@valinux.com>
8 * \par Acknowledgements:
9 * Matthew J Sottek <matthew.j.sottek@intel.com> sent in a patch to fix
10 * the problem with the proc files not outputting all their information.
14 * Created: Mon Jan 11 09:48:47 1999 by faith@valinux.com
16 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
17 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
18 * All Rights Reserved.
20 * Permission is hereby granted, free of charge, to any person obtaining a
21 * copy of this software and associated documentation files (the "Software"),
22 * to deal in the Software without restriction, including without limitation
23 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
24 * and/or sell copies of the Software, and to permit persons to whom the
25 * Software is furnished to do so, subject to the following conditions:
27 * The above copyright notice and this permission notice (including the next
28 * paragraph) shall be included in all copies or substantial portions of the
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
32 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
33 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
34 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
35 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
36 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
37 * OTHER DEALINGS IN THE SOFTWARE.
40 #include <linux/seq_file.h>
43 /***************************************************
44 * Initialization, etc.
45 **************************************************/
50 static struct drm_info_list drm_proc_list
[] = {
51 {"name", drm_name_info
, 0},
52 {"vm", drm_vm_info
, 0},
53 {"clients", drm_clients_info
, 0},
54 {"queues", drm_queues_info
, 0},
55 {"bufs", drm_bufs_info
, 0},
56 {"gem_names", drm_gem_name_info
, DRIVER_GEM
},
57 {"gem_objects", drm_gem_object_info
, DRIVER_GEM
},
59 {"vma", drm_vma_info
, 0},
62 #define DRM_PROC_ENTRIES ARRAY_SIZE(drm_proc_list)
64 static int drm_proc_open(struct inode
*inode
, struct file
*file
)
66 struct drm_info_node
* node
= PDE(inode
)->data
;
68 return single_open(file
, node
->info_ent
->show
, node
);
71 static const struct file_operations drm_proc_fops
= {
73 .open
= drm_proc_open
,
76 .release
= single_release
,
81 * Initialize a given set of proc files for a device
83 * \param files The array of files to create
84 * \param count The number of files given
85 * \param root DRI proc dir entry.
86 * \param minor device minor number
87 * \return Zero on success, non-zero on failure
89 * Create a given set of proc files represented by an array of
90 * gdm_proc_lists in the given root directory.
92 int drm_proc_create_files(struct drm_info_list
*files
, int count
,
93 struct proc_dir_entry
*root
, struct drm_minor
*minor
)
95 struct drm_device
*dev
= minor
->dev
;
96 struct proc_dir_entry
*ent
;
97 struct drm_info_node
*tmp
;
101 for (i
= 0; i
< count
; i
++) {
102 u32 features
= files
[i
].driver_features
;
105 (dev
->driver
->driver_features
& features
) != features
)
108 tmp
= drm_alloc(sizeof(struct drm_info_node
), _DRM_DRIVER
);
109 ent
= create_proc_entry(files
[i
].name
, S_IFREG
| S_IRUGO
, root
);
111 DRM_ERROR("Cannot create /proc/dri/%s/%s\n",
112 name
, files
[i
].name
);
113 drm_free(tmp
, sizeof(struct drm_info_node
),
119 ent
->proc_fops
= &drm_proc_fops
;
122 tmp
->info_ent
= &files
[i
];
123 list_add(&(tmp
->list
), &(minor
->proc_nodes
.list
));
128 for (i
= 0; i
< count
; i
++)
129 remove_proc_entry(drm_proc_list
[i
].name
, minor
->proc_root
);
134 * Initialize the DRI proc filesystem for a device
136 * \param dev DRM device
137 * \param minor device minor number
138 * \param root DRI proc dir entry.
139 * \param dev_root resulting DRI device proc dir entry.
140 * \return root entry pointer on success, or NULL on failure.
142 * Create the DRI proc root entry "/proc/dri", the device proc root entry
143 * "/proc/dri/%minor%/", and each entry in proc_list as
144 * "/proc/dri/%minor%/%name%".
146 int drm_proc_init(struct drm_minor
*minor
, int minor_id
,
147 struct proc_dir_entry
*root
)
149 struct drm_device
*dev
= minor
->dev
;
153 INIT_LIST_HEAD(&minor
->proc_nodes
.list
);
154 sprintf(name
, "%d", minor_id
);
155 minor
->proc_root
= proc_mkdir(name
, root
);
156 if (!minor
->proc_root
) {
157 DRM_ERROR("Cannot create /proc/dri/%s\n", name
);
161 ret
= drm_proc_create_files(drm_proc_list
, DRM_PROC_ENTRIES
,
162 minor
->proc_root
, minor
);
164 remove_proc_entry(name
, root
);
165 minor
->proc_root
= NULL
;
166 DRM_ERROR("Failed to create core drm proc files\n");
170 if (dev
->driver
->proc_init
) {
171 ret
= dev
->driver
->proc_init(minor
);
173 DRM_ERROR("DRM: Driver failed to initialize "
181 int drm_proc_remove_files(struct drm_info_list
*files
, int count
,
182 struct drm_minor
*minor
)
184 struct list_head
*pos
, *q
;
185 struct drm_info_node
*tmp
;
188 for (i
= 0; i
< count
; i
++) {
189 list_for_each_safe(pos
, q
, &minor
->proc_nodes
.list
) {
190 tmp
= list_entry(pos
, struct drm_info_node
, list
);
191 if (tmp
->info_ent
== &files
[i
]) {
192 remove_proc_entry(files
[i
].name
,
195 drm_free(tmp
, sizeof(struct drm_info_node
),
204 * Cleanup the proc filesystem resources.
206 * \param minor device minor number.
207 * \param root DRI proc dir entry.
208 * \param dev_root DRI device proc dir entry.
209 * \return always zero.
211 * Remove all proc entries created by proc_init().
213 int drm_proc_cleanup(struct drm_minor
*minor
, struct proc_dir_entry
*root
)
215 struct drm_device
*dev
= minor
->dev
;
218 if (!root
|| !minor
->proc_root
)
221 if (dev
->driver
->proc_cleanup
)
222 dev
->driver
->proc_cleanup(minor
);
224 drm_proc_remove_files(drm_proc_list
, DRM_PROC_ENTRIES
, minor
);
226 sprintf(name
, "%d", minor
->index
);
227 remove_proc_entry(name
, root
);